<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>葫芦形状</title>
    <style>
        .hulu {
            width: 100px;
            height: 200px;
            background-color: green;
            border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
            position: relative;
            overflow: hidden;
        }

        .hulu::before {
            content: '';
            position: absolute;
            width: 120px;
            height: 120px;
            background-color: green;
            border-radius: 50%;
            top: -60px;
            left: -10px;
        }

        .hulu::after {
            content: '';
            position: absolute;
            width: 140px;
            height: 140px;
            background-color: green;
            border-radius: 50%;
            bottom: -70px;
            left: -20px;
        }
    </style>
</head>
<body>
    <div class="hulu"></div>
</body>
</html>